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问题 选择题

一个圆柱和圆锥的底面积之比是1：3，它们的高相等，这个圆柱与圆锥的体积之比是（　　）

A．1：3

B．3：1

C．4：1

D．1：1

答案

圆柱的体积=1×H=H，

圆锥的体积=

1
3
×3H=H，

圆柱与圆锥的体积之比是H：H=1：1；

故选：D．

选择题

My sister was against my suggestion while my brother was________it.[ ]

A．in favour of

B．in memory of

C．in honour of

D．in search of
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选择题

Thousands of people _____ to watch yesterday's match against Ireland. [ ]

A. turned on

B. turned in

C. turned around

D. turned out

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